Integrate:
∫
3
x
cot
2
(
3
x
)
d
x
\displaystyle \int{3}^{{x}}{{\cot}^{{2}}{\left({3}^{{x}}\right)}}{\left.{d}{x}\right.}
∫
3
x
cot
2
(
3
x
)
d
x
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Question 6
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